WO2023273174A1

WO2023273174A1 - Wave power generation unit and wave power generation device comprising same, and wave power generation method of wave power generation device

Info

Publication number: WO2023273174A1
Application number: PCT/CN2021/136791
Authority: WO
Inventors: 刘臻; 张晓霞; 黎明; 许传礼; 曲娜
Original assignee: 中国海洋大学
Priority date: 2021-06-28
Filing date: 2021-12-09
Publication date: 2023-01-05
Also published as: EP4134541A4; CN113266515A; EP4134541A1

Abstract

A wave power generation unit and a wave power generation device comprising same, and a wave power generation method of the wave power generation device. The wave power generation unit comprises several individual back bent duct structures, which are connected in parallel. Each individual back bent duct structure comprises a bent duct and a buoy (3), wherein the bent duct comprises a vertical bent duct section (2) and a horizontal bent duct section (1), the upper portion of the horizontal bent duct section (1) being connected to the buoy (3), and adjacent vertical bent duct sections (2) being in communication with each other. The vertical bent duct section (2) of one individual back bent duct structure is connected to an air chamber pipeline (4), and the air chamber pipeline (4) is internally provided with an air turbine. The several individual back bent duct structures are combined and connected, and adjacent vertical bent duct sections (2) are in communication with each other, so as to do work on the same air turbine, such that the flow of a reciprocating air flow in an air chamber can be increased. The concept of forming resonance to improve the utilization efficiency of wave energy is provided, and the maximum wave height of water surface motion in an air chamber can be obtained in the parameter optimization process of the wave power generation device.

Description

A wave energy generating unit and its wave energy generating device and wave energy generating method

technical field

The invention relates to the technical field of wave energy conversion, in particular to a wave energy generating unit, a wave energy generating device, and a wave energy generating method.

Background technique

With the in-depth implementation of my country's marine strategy, there is an urgent need to develop an offshore renewable energy power supply system that meets the development of deep and open seas. The single BBDB device (Back Bent Duct Buoy wave energy generation device) is an existing device used in the utilization of ocean wave energy. The device consists of three parts, the floating body, the water inlet and the wave direction are opposite elbow, and rear air turbine. Due to the simple structure of the back-bend device, the rear-end air turbine is not in contact with seawater, and there are no underwater moving parts, the service life of the device is significantly longer than that of other wave energy generation devices.

At present, the single back bend device is mainly designed for different types of pipes and floating bodies. As for the floating body, Liang Xianguang thinks that the front and rear circular floating chamber and the rear-extending type of the back-bent tube floating body are the best (Liang Xianguang, Jiang Niandong, Wang Wei, et al. Research on 5kW back-bent tube wave power generation device [J]. Ocean Engineering, 1999, 17( 004):55-63.), Liang Xianguang conducted a study on the single-row parallel back-bend device (Liang Xianguang, Sun Peiya. Experimental research on the performance of the parallel-connected back-bend wave power generation floating body model [J]. Ocean Engineering, 2003, 21 (003):83-88.), Sun Li combined the single-body rear bending device with the breakwater for the safety protection of marine equipment, Wu Bijun designed a variety of single-body rear bending device models (Wu Bijun, Li Meng, Wu Rukang, etc. Backbend pipe wave energy utilization technology and prototype design[J]. Ocean Technology Journal, 2016(5):10-16.), foreign research on the device also basically revolves around the type and size of the device's buoyant body and bend pipe Optimization of ((Open Sea Trials on Floating Wave Energy Device Backward Bent Ducted Buoy and Its Performance Optimization Volume 2), (Luczko E, Robertson B, Bailey H, et al.Representing non-linear wave energy converters in coastal models[Jwave ]. Renewable Energy, 2018:376-385.), (Numerical study of a large floating oscillating water column device using a 2D boundary element method)).

However, research on device arrays is largely blank. The development of wave energy is gradually developing in the deep sea. Ensuring energy supply is an important part. Previously, the research and development of wave energy was mainly used as independent power supply equipment at sea. Due to the limitation of the size of the device itself, the power generation output could not meet the electricity demand. In order to increase the power generation capacity, a larger number of single back bend pipe devices are usually arranged in a scattered array. However, due to the wave force, the rear bending device has six degrees of freedom of movement, and the scattered point array is not conducive to the energy capture of the rear device due to the shading effect. In addition, there is not much research on how to make full use of the energy of the wave to convert it into the oscillation of the air in the air chamber for the single-body rear-bend device. The Chinese patent application publication number CN108425788A discloses a one-way impulsive wave energy generating device. A fixed block and a first fixed ring are installed in the air cabin. Its rotating movable rod; the first end of the intake elbow is installed in the draft tank under the aluminum alloy cover plate, the second end is located on the upper part of the buoyancy chamber and is provided with a second fixing ring, and the second end of the intake elbow is There is a rubber sheet that can be attached to or loosen the second fixing ring inside; the straight air outlet pipe is installed on the upper part of the air cabin, and is connected with the installation pipe and the one-way impulsive air turbine through the first flange, that is to say , this solution only improves the internal structure of the single rear bend pipe structure, and cannot achieve the effect of better utilization of wave energy. The Chinese patent with application publication number CN 107044379 A discloses a self-propelled green energy power supply device at sea. The hull is provided with at least one wave energy generating unit group. The wave energy generation unit, that is to say, the scheme installs the single back bend pipe structure on the hull, but obviously reduces the vibration frequency of the back bend pipe structure itself, and this scheme only utilizes the single back bend pipe The structure cannot achieve the effect of better utilization of wave energy.

Contents of the invention

The object of the present invention is to provide a wave energy generating unit and its wave energy generating device and wave energy generating method to solve the problems in the prior art. The vertical sections of the elbow are connected to each other and work on the same air turbine, which can increase the flow rate of the reciprocating air in the air chamber, significantly increase the utilization efficiency of wave energy, and increase the installed capacity.

To achieve the above object, the present invention provides the following scheme:

The present invention provides a wave energy generating unit, which includes several single back bend pipe structures connected in parallel. The single back bend pipe structure includes a bend pipe and a floating body. The bend pipe includes a vertical section of the bend pipe and a horizontal bend pipe. The upper part of the horizontal section of the elbow is connected with the floating body, and the adjacent vertical sections of the elbow are connected to each other, and the vertical section of the elbow of one of the single back elbow structures is connected with an air The chamber pipe is provided with an air turbine inside the air chamber pipe.

Preferably, the air chamber pipe is in the same direction as the horizontal section of the elbow, and is located on the upper part of the floating body.

Preferably, the cross-section of the horizontal section of the elbow is fan-shaped to form an open horizontal section of the elbow.

Preferably, the floating body is connected as a whole.

The present invention provides a wave energy generating device, which includes the aforementioned wave energy generating unit, and a plurality of the wave energy generating units are connected to form a ring or a polygon.

Preferably, the wave energy generating unit is directly connected to the adjacent wave energy generating unit, or connected through a connecting section.

Preferably, the connecting section is a connecting corner, and is made of the same material as that of the floating body.

The present invention also provides a power generation method of a wave energy power generation device, comprising the following steps:

Under certain wave conditions, adjust the draft of the wave power generation device, and measure the wave height of the wave movement in the air chamber corresponding to different drafts;

Comparing the measured wave motion heights, select the draft corresponding to the largest wave motion height;

The wave energy generating device is installed according to the selected draft, and the wave energy is used to generate electricity.

Preferably, when adjusting the draft,

The wave height of the wave motion is measured according to the low-density draft depth interval, and a section with a relatively large wave motion height is selected;

Measure the wave motion height of this section according to the high-density draft depth interval, and obtain the draft corresponding to the maximum wave motion wave height.

Preferably, the parameters of the direction of the opening of the air chamber, the size of the opening of the air chamber, the size of the cross-sectional area of the air chamber, the length of the elbow and the cross-sectional area of the opening of the elbow are optimized.

Compared with the prior art, the present invention has achieved the following technical effects:

(1) The wave energy generating unit of the present invention combines and connects several single back bend pipe structures, so that the vertical sections of adjacent bend pipes communicate with each other, and perform work on the same air turbine, which can increase the force of the reciprocating airflow in the air chamber. The flow rate can significantly increase the utilization efficiency of wave energy and increase the installed capacity;

(2) The wave energy generating device of the present invention is composed of a plurality of wave energy generating units connected into a ring or a polygon to form a compact array with a certain topology, which can not only avoid the shadowing effect (when the single rear bend pipe structure is used alone, due to the There are six degrees of freedom movement under the action of wave force, and the scatter-point array is not conducive to the energy capture of the rear device due to the shading effect), and the wave energy generation device can be resonated with the wave motion by reasonably arranging the number of arrays of the wave energy generation unit Effectiveness, significantly improving the overall performance of the array device;

(3) The wave energy generating device of the present invention is connected by wave energy generating units, and a connecting section is arranged therebetween. The connecting section can be used as a floating body, and can also be used as an integrated power supply device for the rear-end air turbine. Therefore, the overall structure is assembled, Compact structure, easy installation and disassembly, ready-to-use, can be used for multiple disassembly, with sustainable utilization; in addition, due to the overall block-type assembly structure (forming modularization), it can be used according to the location of operation and service Requirements for location and power consumption, flexible arrangement of topology, number of arrays, number of turbines, etc.;

(4) The wave energy generating device of the present invention can be assembled from a plurality of wave energy generating units, and the anchor points can be shared between the wave energy generating units, and the mooring mode can be reasonably arranged, thereby reducing the cost of operation;

(5) The present invention provides an idea of improving wave energy utilization efficiency by forming resonance, which changes the prior art in which only a single back-bend structure is improved and the number of scattered-point arrays with a back-bend structure is added to increase power generation In the process of optimizing the parameters of the wave energy power generation device, the maximum wave height of the water surface motion in the gas chamber is obtained, and then the relevant parameters can be improved to achieve the best operating conditions of the device and improve the utilization efficiency of wave energy.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings required in the embodiments. Obviously, the accompanying drawings in the following description are only some of the present invention. Embodiments, for those of ordinary skill in the art, other drawings can also be obtained based on these drawings without any creative effort.

Fig. 1 is a schematic diagram of the structure of a rectangular single back bend;

Fig. 2 is a schematic diagram of a wave energy generating unit formed by a rectangular single back bend pipe structure;

Fig. 3 is a schematic diagram of the structure of a single rectangular single back bend in the wave energy generating unit;

Fig. 4 is a schematic diagram of a polygonal wave energy generating device formed by a rectangular single back bend pipe structure;

Fig. 5 is a schematic diagram of an annular wave energy generating device formed by a rectangular single back bend pipe structure;

Fig. 6 is a schematic diagram of the structure of a fan-shaped single back bend;

Fig. 7 is a schematic diagram of a wave energy generating unit formed by a fan-shaped single back bend pipe structure;

Fig. 8 is a schematic diagram of a wave energy generating device formed by a fan-shaped single back bend pipe structure;

Fig. 9 is a graph showing the effect of draft on the wave height in the gas chamber;

Among them, 1. The horizontal section of the elbow; 2. The vertical section of the elbow; 3. The floating body; 4. The air chamber pipe; 5. The connecting section.

detailed description

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

The purpose of the present invention is to provide a wave energy generating unit and its wave energy generating device and wave energy generating method to solve the problems existing in the prior art. The vertical sections of the tubes are connected to each other and perform work on the same air turbine, which can increase the flow rate of the reciprocating air in the air chamber, significantly increase the utilization efficiency of wave energy, and increase the installed capacity.

In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

Referring to Figs. 1-3, as shown in Figs. 6-7, the present invention provides a wave energy generating unit, which includes a plurality of single back bend pipe structures connected in parallel, wherein, the single back bend pipe structure can be rectangular (as shown in Fig. 1 -3), or fan-shaped (as shown in Figure 6-7), all of which are spliced by baffles. The baffles can be connected by bolts, and connection gaskets can be set. It should be noted that the bolts include side bolts and bottom bolts, the side bolts can ensure the limit within the horizontal range, and the bolts at the bottom of the elbow can limit the vertical vibration between each other. Through the arrangement of bolts from all directions, the integrity of the single rear bend pipe structure can be enhanced, and the structural stability can be avoided from being impacted by waves in sea water. The structure of the single back elbow includes an elbow and a floating body 3. The floating body 3 can be a box structure with internal weights to adjust the position relative to the water surface, or the floating body 3 is made of light materials; in short, the floating body 3 is used to provide buoyancy, so that The whole device can float on the water surface and have a certain depth of draft. The elbow includes the vertical section 2 of the elbow and the horizontal section 1 of the elbow. After the horizontal section 1, the air in the air chamber impacts to form oscillations, and the oscillating air impacts the air turbine, making the air turbine do work to generate electricity. The floating body 3 is connected to the upper part of the horizontal section 1 of the elbow, and can be connected by conventional rigid body connection structures, such as connection skeletons, positioning grooves, screws, tenons and matching mortise holes. The size of the buoyant body 3 is adjusted accordingly according to the draft requirement. The single-body backbend structure is connected on the side, and bolts can also be used for connection, and the connection position can be the same as the bolt setting position of the single-body backbend structure, that is to say, it can be assembled directly on the basis of the baffle. A wave energy generating unit is formed. It should be noted that adjacent elbow vertical sections 2 communicate with each other, that is, form a connected air chamber, and one of the elbow vertical sections 2 of a single back elbow structure is connected with an air chamber pipe 4, and the air chamber An air turbine is arranged in the pipeline 4, and the air turbine can adopt an impact turbine, a Wells turbine, etc., and a generator, a storage battery and the like are installed at the rear end of the air turbine; the adjacent elbow horizontal section 1 is not connected, That is to say, a baffle is arranged between the adjacent horizontal sections 1 of the elbow, and the existence of the baffle can rectify the flow direction of the water flow in the horizontal section 1 of the elbow, so that the flow direction is more along the direction of the crest line, and more Conducive to the conversion of wave energy into air kinetic energy. In addition, the number of single rear elbow structures in the wave energy generation unit should not be too large. When the number is too large, the wave surface movement in the air chamber will produce a phase difference, and the consistency will deteriorate, which is not conducive to the convergence of the airflow. Therefore, the single rear The number of bent pipe structures shall be reasonably determined according to the test. The air chamber pipeline 4 can be arranged vertically or horizontally according to design requirements, can be arranged inside the vertical section 2 of the elbow, and can also be arranged outside the vertical section 2 of the elbow. The gas chambers of section 2 can be connected. The wave energy generating unit of the present invention combines and connects several single back elbow structures, so that the vertical sections 2 of adjacent elbow pipes communicate with each other, that is, the air chambers of a group of wave energy generating units are shared, and the same air turbine Performing work can increase the flow rate of the reciprocating airflow in the air chamber, significantly increase the utilization efficiency of wave energy, and increase the installed capacity.

The air chamber pipeline 4 can be in the same direction as the elbow horizontal section 1, that is to say, the air chamber pipeline 4 can be perpendicular to the elbow vertical section 2. At this time, the air chamber pipeline 4 is connected to the elbow vertical section 2 and For a section of pipeline extending outward, in order to guide the airflow into the air chamber pipeline 4, a baffle plate needs to be installed on the top of the vertical section 2 of the elbow. Moreover, the diameter of the gas chamber pipeline 4 can be smaller than the inner diameter of the vertical section 2 of the elbow, so that the impact of the gas in the gas chamber on the air turbine in the gas chamber pipeline 4 can be enhanced, and the utilization efficiency of wave energy can be increased. Increase installed capacity. The gas chamber pipeline 4 can be installed on the upper part of the floating body 3, and at this time, it can be supported by the floating body 3 to ensure the stability of the installation structure of the gas chamber pipeline 4 and prevent the reliability of the overall structure from being affected by vibration.

As shown in Figure 6-7, the cross-section of the horizontal section 1 of the elbow is fan-shaped, forming an open structure of the horizontal section 1 of the elbow, which can increase the size of the inlet, so that the collected wave flow is larger, and the wave flow flows along the The horizontal section 1 of the elbow gradually flows in the direction of the vertical section 2 of the elbow. As the inner diameter of the horizontal section 1 of the elbow gradually decreases, the pressure of the wave energy can be increased, and the vertical section of the elbow can be filled in a wider range 2 space, at this time, the air chamber in the vertical section 2 of the elbow can be squeezed and oscillated by the filled waves to generate powerful air oscillations and better promote the air turbine to perform work. Therefore, since the cross-sectional area of the water inlet is larger than the oscillation cross-sectional area of the air chamber, the structural form of the fan-shaped elbow horizontal section 1 has a better wave gathering effect and is more conducive to increasing the heave amplitude of the wave surface in the air chamber. At the same time, the vertical section 2 of the elbow can also be arranged in a fan-shaped structure, and the connection position between the vertical section 2 of the elbow and the horizontal section 1 of the elbow should be smoothly transitioned to avoid obstacles to water flow and air flow.

The floating bodies 3 with different single back bend structures can be arranged separately, and after being connected into a wave energy generating unit, they can be connected as a whole, or directly made of a whole floating body 3 .

As shown in Figures 4-5 and Figure 8, the present invention provides a wave energy generating device, which can apply the wave energy generating unit described above, and a plurality of wave energy generating units are connected in a ring (as shown in Figure 5 and Figure 8 ) or a polygon (as shown in Figure 4). Most of the breeding cages are cylindrical and quadrangular. The quadrilateral or circular wave energy generation device can be combined with the existing offshore production and living equipment to provide power for the marine breeding cages. If the wave energy generating device is combined with the deep sea wind turbine pile foundation (for coupling wind and wave energy), a triangular wave energy generating device array scheme can be applied. As the development of wave energy gradually develops into the deep sea, ensuring energy supply is an important part. Previously, the research and development of wave energy was mainly used as independent power supply equipment at sea. Due to the size limitation of the device itself, the power generation capacity could not meet the electricity demand. In order to meet the requirements Generally, multiple devices are used in a scatter-point array. When the single rear elbow structure is used alone, it has six degrees of freedom due to the wave force. The scatter-point array is not conducive to the energy capture of the rear device due to the shading effect. The wave energy generating device of the present invention is composed of multiple wave energy generating units connected into a ring or polygon to form a compact array with a certain topology, which can not only avoid the shadowing effect, but also make the wave energy The motion of the energy generating device and the wave motion produce a resonance effect, which significantly improves the overall performance of the array device. It should be noted that each ring-shaped and polygonal wave power generation device needs to be specifically designed according to the application scenario and resonance situation because of the different sea areas and different wave conditions, and the coupling resonance with the device is also different. Since the wave energy generation device as a whole is a block-type assembly structure (forming modularization), it can flexibly arrange topology, number of arrays, number of turbines, etc. according to the requirements of the operation location, service location, and power demand. The connection can be connected by bolts, and the connection method can refer to the connection method of the wave energy generating unit.

Furthermore, the wave energy generating units formed by the fan-shaped back-bent pipe structure can be directly connected to each other to form a ring structure, while the wave-energy generating units formed by the rectangular back-bending pipe structure need to be provided with connecting sections at the corners when they are connected into a ring or polygonal structure 5, to form an arc transition. The connecting section 5 can be used as the floating body 3, and can also be used for the integrated power supply device of the rear-end air turbine. Therefore, the overall structure is assembled, the structure is compact, the installation and disassembly are convenient, and it can be put into use immediately, and can be used for multiple disassembly. It has the ability of sustainable use.

The connecting section 5 can be a connecting angle, and the same material as the floating body 3 is used. After the connecting section 5 is applied, the buoyancy distribution of the wave energy generating device can be balanced, and the number and volume of the floating body 3 can be reduced. A plurality of wave energy generating units are assembled into a wave energy generating device. The anchor points can be shared among the wave energy generating units, and mooring methods can be reasonably arranged, thereby reducing the cost of operation.

The present invention also provides a power generation method of a wave energy generating device. The wave energy generating device can use the wave energy generating device described above, including the following steps:

Under certain wave conditions, the draft of the wave energy generating device can be adjusted by changing different floating bodies 3 (changing different volumes or different materials, or adjusting the counterweight inside the floating body 3). The size of the wave motion wave height in the air chamber corresponding to different drafts;

A wave energy generating device is installed in the seawater according to the selected draft, and the wave energy of the seawater is used to generate electricity.

The present invention provides an idea of improving wave energy utilization efficiency by forming resonance, and changes the way in the prior art that only improves a single back-bent pipe structure and adds scattered-point arrays of the back-bend pipe structure to increase power generation , in the process of optimizing the parameters of the wave energy power generation device, the maximum wave height of the water surface motion in the gas chamber can be obtained, and then by improving the relevant parameters to achieve the best operating conditions of the device, and improve the utilization efficiency of wave energy.

Further, when adjusting the draft, first measure the wave motion wave height according to the low-density draft depth interval, and select a section with a relatively large wave motion wave height;

Then measure the wave motion wave height of this section according to the high-density draft depth interval, and obtain the corresponding draft of the maximum wave motion wave height.

After optimizing the draft, parameters such as the direction of the air chamber opening, the size of the air chamber opening, the cross-sectional area of the air chamber, the length of the elbow, and the cross-sectional area of the elbow opening can also be optimized to obtain the best resonance effect.

The present invention provides a specific optimization embodiment. Under certain wave conditions, the optimal parameters are found by studying the parameters of the single rear bend pipe structure.

Taking the draft as an example, the maximum energy conversion of the single back bend structure is the goal. Through calculation, the optimal draft of the single back bend structure is obtained, which guides the selection of materials for the floating body 3 and the single back bend in practical applications. Structural weights, etc.

The wave conditions of this embodiment refer to the wave elements in the sea area of Qingdao area. The length of the single back bend pipe structure is designed to be 13.6m, the width is 6.4m, and the height is 10.4m. The horizontal section 1 of the elbow is 13.6m long, and the vertical section 2 of the elbow is 10.4m long. It is a rectangular pipe with an aspect ratio of 2:1, that is, the section is 6.4m long and 3.2m wide. In order to provide buoyancy to the single back bend pipe structure and maintain its balance, a cuboid floating body 3 of 7.2m×10.4m×6.4m is set.

Through the numerical calculation method, under the Froude similarity criterion, the scale of the numerical model is selected as 1:16.

The wave height of the prototype is 2m and the period is 7s. Under the similarity criterion, the numerical calculation wave condition is 0.12m and the period is 1.75s.

Change the draft position of the rear elbow structure of the single unit, take the distance from the bottom of the front wall of the device to the water surface as the draft, and study the waves in the air chamber of the device under the conditions of drafts of 0.215m, 0.240m, 0.265m, 0.290m, 0.315m, and 0.340m. Motion wave height corresponding to the situation. It can be seen that under the condition of a draft of 0.240m-0.265m in the single rear elbow structure, the wave motion response intensity in the air chamber is relatively large, and the water surface motion amplitude in the air chamber is stronger than the water surface motion amplitude in the wave field. Through further intensive research on the draft in this range, as shown in Figure 9, the curve of the relationship between the draft and wave height of the single rear elbow structure can be shown, and the optimal draft is 0.255m. Through this method, the optimization of draft parameters is completed. It can be used to guide the design and manufacture of the array structure of the wave energy generating device in the later stage.

In the present invention, specific examples have been used to illustrate the principle and implementation of the present invention. The description of the above embodiments is only used to help understand the method and core idea of the present invention; meanwhile, for those of ordinary skill in the art, according to the present invention The idea of the invention will have changes in the specific implementation and scope of application. In summary, the contents of this specification should not be construed as limiting the present invention.

Claims

A wave energy generating unit, characterized in that it includes several single back bend pipe structures connected in parallel, the single back bend pipe structure includes a bend pipe and a floating body, and the bend pipe includes a vertical section of the bend pipe and a bend pipe The horizontal section, the upper part of the horizontal section of the elbow is connected with the floating body, and the adjacent vertical sections of the elbow are connected to each other, and the vertical section of the elbow of one of the single rear elbow structures is connected with An air chamber pipeline is provided with an air turbine inside the air chamber pipeline.
The wave energy generating unit according to claim 1, characterized in that: the air chamber pipe is in the same direction as the horizontal section of the elbow, and is located on the upper part of the floating body.
The wave energy generating unit according to claim 1 or 2, characterized in that: the cross-section of the horizontal section of the curved pipe is fan-shaped, forming an open horizontal section of the curved pipe.
The wave energy generating unit according to claim 3, characterized in that: the floating body is connected as a whole.
A wave energy generating device, characterized in that it comprises several wave energy generating units according to any one of claims 1-3, and a plurality of said wave energy generating units are connected to form a ring or a polygon.
The wave energy generating device according to claim 5, characterized in that: the wave energy generating unit is directly connected to the adjacent wave energy generating unit, or connected through a connecting section.
The wave energy generating device according to claim 6, wherein the connecting section is a connecting angle, and is made of the same material as that of the floating body.
A power generation method for a wave energy power generation device, characterized in that it comprises the following steps:

Under certain wave conditions, adjust the draft of the wave power generation device, and measure the wave height of the wave movement in the air chamber corresponding to different drafts;

Comparing the measured wave motion heights, select the draft corresponding to the largest wave motion height;

The wave energy generating device is installed according to the selected draft, and the wave energy is used to generate electricity.
The power generation method of a wave energy power generation device according to claim 8, characterized in that: when adjusting the draft,

The wave height of the wave motion is measured according to the low-density draft depth interval, and a section with a relatively large wave motion height is selected;

Measure the wave motion height of this section according to the high-density draft depth interval, and obtain the draft corresponding to the maximum wave motion wave height.
The power generation method of the wave energy power generation device according to claim 8 or 9, characterized in that: optimize the parameters of the opening direction of the air chamber, the size of the opening of the air chamber, the size of the cross-sectional area of the air chamber, the length of the elbow, and the cross-sectional area of the opening of the elbow .